U.S. patent application number 15/125010 was filed with the patent office on 2017-01-26 for vacuum insulating material and refrigerator including same.
This patent application is currently assigned to SAMSUNG ELECTRONICS CO., LTD.. The applicant listed for this patent is SAMSUNG ELECTRONICS CO., LTD.. Invention is credited to Seung Hoon KAL, Hyung Sung KIM, Jong Sung PARK, Se Won YOOK.
Application Number | 20170023291 15/125010 |
Document ID | / |
Family ID | 54245224 |
Filed Date | 2017-01-26 |
United States Patent
Application |
20170023291 |
Kind Code |
A1 |
KAL; Seung Hoon ; et
al. |
January 26, 2017 |
VACUUM INSULATING MATERIAL AND REFRIGERATOR INCLUDING SAME
Abstract
Disclosed are a vacuum insulating material having an improved
structure as to enhance insulation and durability and a
refrigerator having the same. The vacuum insulating material
includes a core material, a first envelope disposed at an outer
side of the core material, a blocking layer disposed between the
core material and the first envelope, and a second envelope
coupling to the first envelope to form an accommodating space in
which the core material and the blocking layer are accommodated,
wherein the blocking layer is welded or adhered to the first
envelope to form an integral unit with the first envelope.
Inventors: |
KAL; Seung Hoon; (Anyang-si,
KR) ; KIM; Hyung Sung; (Yongin-si, KR) ; PARK;
Jong Sung; (Seoul, KR) ; YOOK; Se Won; (Seoul,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SAMSUNG ELECTRONICS CO., LTD. |
Suwon-si |
|
KR |
|
|
Assignee: |
SAMSUNG ELECTRONICS CO.,
LTD.
Suwon-si
KR
|
Family ID: |
54245224 |
Appl. No.: |
15/125010 |
Filed: |
March 10, 2015 |
PCT Filed: |
March 10, 2015 |
PCT NO: |
PCT/KR2015/002299 |
371 Date: |
September 9, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B32B 2307/7265 20130101;
B32B 27/34 20130101; B32B 15/20 20130101; B32B 2264/10 20130101;
F25D 2201/14 20130101; B32B 2307/7244 20130101; B32B 2255/205
20130101; B32B 2250/00 20130101; B32B 7/04 20130101; B32B 7/12
20130101; B32B 1/00 20130101; F25D 11/00 20130101; B32B 2307/7242
20130101; B32B 2264/102 20130101; B32B 18/00 20130101; B32B 27/06
20130101; B32B 15/04 20130101; B32B 2307/30 20130101; F25D 23/065
20130101; B32B 2307/7246 20130101; B32B 2255/20 20130101; B32B
2255/00 20130101; B32B 27/306 20130101; B32B 2264/105 20130101;
B32B 2509/10 20130101; B32B 15/085 20130101; B32B 27/16 20130101;
B32B 27/32 20130101; B32B 2307/304 20130101; B32B 27/28 20130101;
B32B 27/36 20130101 |
International
Class: |
F25D 23/06 20060101
F25D023/06; F25D 11/00 20060101 F25D011/00; B32B 27/32 20060101
B32B027/32; B32B 18/00 20060101 B32B018/00; B32B 15/085 20060101
B32B015/085; B32B 15/20 20060101 B32B015/20 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 11, 2014 |
KR |
10-2014-0028234 |
Jun 26, 2014 |
KR |
10-2014-0078761 |
Claims
1. A vacuum insulating material, comprising: a core material; a
first envelope disposed at an outer side of the core material; a
blocking layer disposed between the core material and the first
envelope; and a second envelope coupling to the first envelope to
form an accommodating space in which the core material and the
blocking layer are accommodated, wherein the blocking layer is
welded or adhered to the first envelope to be integrally formed
with the first envelope.
2. The vacuum insulating material of claim 1, wherein: the first
envelope and the second envelope have different thermal
conductivities from each other.
3. The vacuum insulating material of claim 1, wherein: the first
envelope has a lower thermal conductivity than that of the second
envelope.
4. The vacuum insulating material of claim 1, wherein: the first
envelope includes an aluminum deposition envelope, and the second
envelope includes an aluminum foil envelope.
5. The vacuum insulating material of claim 1, further comprising: a
blocking layer disposed between the core material and the second
envelope, wherein the blocking layer is welded or adhered to the
second envelope to form an integral unit with the second
envelope.
6. The vacuum insulating material of claim 5, wherein: the first
envelope and the second envelope each includes an aluminum
deposition envelope.
7. The vacuum insulating material of claim 1, wherein: the first
envelope includes a first domain formed along an edge of the first
envelope and a second domain formed at an inner side of the first
domain, and the blocking layer is bonded to the second domain.
8. The vacuum insulating material of claim 7, wherein: the blocking
layer is further bonded to at least a part of the first domain.
9. The vacuum insulating material of claim 7, wherein: the second
domain includes a bent portion bent at an edge of the core
material.
10. The vacuum insulating material of claim 7, wherein: the first
envelope has a lower thermal conductivity than that of the second
envelope, and the first domain is bent such that the second
envelope is positioned between the core material and the first
domain.
11. The vacuum insulating material of claim 1, wherein: the
blocking layer has the same width as the core material.
12. The vacuum insulating material of claim 1, wherein: the
blocking layer has a width smaller than the core material.
13. The vacuum insulating material of claim 1, wherein: the first
envelope includes a welding layer facing the accommodating space in
an inner side direction of the core material.
14. The vacuum insulating material of claim 5, wherein: the second
envelope includes a sealing layer facing the accommodating space in
an inner side direction of the core material.
15. The vacuum insulating material of claim 7, wherein: the first
envelope includes a welding layer that faces the accommodating
space in an inner side direction of the core material, the second
envelope includes a sealing layer that faces the accommodating
space in the inner side direction of the core material, and the
welding layer and the sealing layer are bonded to each other by
welding or adhesion in at least a part of the first domain.
16. The vacuum insulating material of claim 13, wherein: the
welding layer and the sealing layer each includes at least one of
LLDPE (Linear Low-Density Polyethylene) and LDPE (Low Density
Polyethylene).
17. The vacuum insulating material of claim 15, wherein: the
blocking layer includes a base layer facing the welding layer and
bonded to the welding layer, and the base layer is bonded to the
welding layer by welding or adhesion.
18. The vacuum insulating material of claim 17, wherein: the
blocking further includes at least one of at least one metallic
layer and an inorganic deposition layer that are staked on the base
layer toward the core material.
19. The vacuum insulating material of claim 15, wherein: the
blocking layer includes a metallic layer facing the welding layer
and bonded to the welding layer.
20. The vacuum insulating material of claim 15, wherein: the first
envelope further includes at least one barrier layer disposed on
the welding layer toward an outer side of the core material, and
the at least one barrier layer includes a substrate layer, and a
deposition layer provided on the substrate layer as to block gas
and moisture being introduced toward the core material, and the
deposition layer includes at least one of Al, SiO.sub.2, and
Al.sub.2O.sub.3.
21-45. (canceled)
Description
TECHNICAL FIELD
[0001] Embodiments of the present disclosure relate to a vacuum
insulating material and a refrigerator including the same, and more
particularly, a vacuum insulating material having an improved
structure as to enhance insulation and durability, and a
refrigerator including the same.
BACKGROUND ART
[0002] The energy that mankind consumes is scarce, and global
warming caused by carbon dioxide that is generated by using the
energy is one of the biggest problems that human race faces along
with the energy crisis. Accordingly, energy regulations of each
country are reinforced every day, and the energy rating system with
respect to household appliances is a challenge that each
manufacturer has. The energy regulations of any government in the
world demanding maximized efficiency with less energy are well in
accord with the demands of consumers wanting higher storage
capacity and lower power consumption. Particularly, with respect to
refrigerators, many researches have been conducted in several
decades in the past, and researches with respect to a cooling
cycle, a compressor, and a heat exchanger have already reached the
limit. Thus, recently, researches with respect to heat loss have
been a mainstream, and many attempts have been made as to increase
energy efficiency by reinforcing heat insulating performance of
refrigerators.
[0003] The conventional heat insulating material such as
polyurethane is provided with thermal conductivity of about 20
mK/m.largecircle.K, and in a case when using such, the thickness of
an outside wall of a refrigerator becomes thicker, and the storage
capacity of the refrigerator is decreased. Thus, as to solve the
difficulty as such, a use of a vacuum insulating material having
superior heat insulating performance is needed.
[0004] However, the Heat Bridge of vacuum insulating material, that
is, a phenomenon in which heat flows through an edge of the vacuum
insulating material and durability are in a contradicting
relationship with respect to each other, and thus a limitation is
present in manufacturing the efficient vacuum insulating
material.
DISCLOSURE
Technical Problem
[0005] The present disclosure is directed to providing a vacuum
insulating material having an improved structure as to effectively
prevent gas and moisture penetration, and a refrigerator including
the same.
[0006] The present disclosure is also directed to providing a
vacuum insulating material having an improved structure as to
prevent Heat Bridge and enhance durability, and a refrigerator
including the same.
[0007] The present disclosure is also directed to providing a
vacuum insulating material having an improved structure as to
decrease volume of the vacuum insulating material, and a
refrigerator including the same.
Technical Solution
[0008] One aspect of the present disclosure provides a vacuum
insulating material, including: a core material; a first envelope
disposed at an outer side of the core material; a blocking layer
disposed between the core material and the first envelope; and a
second envelope coupling to the first envelope to form an
accommodating space in which the core material and the blocking
layer are accommodated, wherein the blocking layer is welded or
adhered to the first envelope to be integrally formed with the
first envelope.
[0009] Here, the first envelope and the second envelope may have
different thermal conductivities from each other.
[0010] Also, the first envelope may have a lower thermal
conductivity than that of the second envelope.
[0011] Also, the first envelope may include an aluminum deposition
envelope, and the second envelope includes an aluminum foil
envelope.
[0012] Also, the vacuum insulating material may further include a
blocking layer disposed between the core material and the second
envelope, wherein the blocking layer is welded or adhered to the
second envelope to form an integral unit with the second
envelope.
[0013] Also, the first envelope and the second envelope each may
include an aluminum deposition envelope.
[0014] Also, the first envelope may include a first domain formed
along an edge of the first envelope and a second domain formed at
an inner side of the first domain, and the blocking layer may be
bonded to the second domain.
[0015] Also, the blocking layer may be further bonded to at least a
part of the first domain.
[0016] Also, the second domain may include a bent portion bent at
an edge of the core material.
[0017] Also, the first envelope may have a lower thermal
conductivity than that of the second envelope, and the first domain
may be bent such that the second envelope is positioned between the
core material and the first domain.
[0018] Also, the blocking layer may have the same width as the core
material.
[0019] Also, the blocking layer may have a width smaller than the
core material.
[0020] Also, the first envelope may include a welding layer facing
the accommodating space in an inner side direction of the core
material.
[0021] Also, the second envelope may include a sealing layer facing
the accommodating space in an inner side direction of the core
material.
[0022] Also, the first envelope may include a welding layer that
faces the accommodating space in an inner side direction of the
core material, the second envelope may include a sealing layer that
faces the accommodating space in the inner side direction of the
core material, and the welding layer and the sealing layer may be
bonded to each other by welding or adhesion in at least a part of
the first domain.
[0023] Also, the welding layer and the sealing layer each may
include at least one of LLDPE ((Linear Low-Density Polyethylene)
and LDPE (Low Density Polyethylene).
[0024] Also, the blocking layer may include a base layer facing the
welding layer and bonded to the welding layer, and the base layer
may be bonded to the welding layer by welding or adhesion.
[0025] Also, the blocking may further include at least one of at
least one metallic layer and an inorganic deposition layer that are
staked on the base layer toward the core material.
[0026] Also, the blocking layer may include a metallic layer facing
the welding layer and bonded to the welding layer.
[0027] Also, the first envelope may further include at least one
barrier layer disposed on the welding layer toward an outer side of
the core material.
[0028] Also, the at least one barrier layer may include a substrate
layer and a deposition layer provided on the substrate layer as to
block gas and moisture being introduced toward the core material,
and the deposition layer may include at least one of Al, SiO.sub.2,
and Al.sub.2O.sub.3.
[0029] Also, the at least one barrier layer may further include a
penetration preventing layer provided between the welding layer and
the substrate layer, and the penetration preventing layer may
include at least one of EVOH (Ethylene Vinyl Alcohol) and VM-EVOH
(Vacuum Metalized-Ethylene Vinyl Alcohol).
[0030] Another aspect of the present disclosure provides a vacuum
insulating material, including: a core material; a first envelope
disposed at an outer side of the core material; a blocking layer
disposed between the core material and the first envelope and
bonded to the first envelope as to be integrally formed with the
first envelope; and a second envelope having a thermal conductivity
greater than a thermal conductivity of the first envelope and
coupled to the first envelope to form an accommodating space in
which the core material and the blocking layer are accommodated,
wherein the first envelope and the second envelope bonded to each
other by welding or adhesion to form an extension portion extended
toward an outer side of the accommodating space.
[0031] Here, the extension portion may be bent such that the first
envelope is positioned at an outer side of the second envelope.
[0032] Also, the first envelope may include a welding layer to
which the blocking layer is bonded, and a barrier layer stacked at
an outer side of the welding layer.
[0033] Also, the second envelope may include a sealing member
surrounding the core material, and the welding layer and the
sealing member are bonded to each other to form the extension
portion.
[0034] Also, the welding layer and the sealing member each may
include at least one of LLDPE (Linear Low-Density Polyethylene) and
LDPE (Low Density Polyethylene).
[0035] Also, the barrier layer may be provided in a plurality of
layers, the plurality of layers may include a substrate layer and a
deposition layer disposed facing the substrate layer as to block
gas and moisture being introduced toward the core material, and the
deposition layer may include at least one of Al, SiO.sub.2, and
Al.sub.2O.sub.3.
[0036] Also, the plurality of layers may further include a
penetration preventing layer provided between the welding layer and
the substrate layer, and the penetration preventing layer includes
at least one of EVOH (Ethylene Vinyl Alcohol) and VM-EVOH (Vacuum
Metalized-Ethylene Vinyl Alcohol).
[0037] Also, the plurality of layers may further include a
protective layer provided on the deposition layer as to absorb an
outside impact, and the protective layer may include at least one
of PET (Polyethylene Phthalate) and Nylon.
[0038] Also, the blocking layer may include a first layer bonded to
the welding layer by welding or adhesion, and a second layer
stacked on the first layer toward an inner side of the core
material, and the second layer may include at least one of an
inorganic deposition layer and a plurality of metallic layers.
[0039] Still another aspect of the present disclosure provides a
refrigerator having an outer case forming an exterior appearance of
the refrigerator, an inner case provided at an inside the outer
case to form a storage compartment, and a vacuum insulating
material positioned between the outer case and the inner case,
wherein; the vacuum insulating material includes a core material; a
first envelope disposed at an outer side of the core material as to
face an inner surface of the outer case; a blocking layer disposed
between the core material and the first envelope and bonded to the
first envelope as to be integrally formed with the first envelope;
and a second envelope having a thermal conductivity larger than a
thermal conductivity of the first envelope and configured coupled
to the first envelope while facing an outer surface of the inner
case to form an accommodating space in which the core material and
the blocking layer are accommodated, and the second envelope is
bonded along an edge of the first envelope by welding or
adhesion.
[0040] Here, the first envelope may be coupled to an inner surface
of the outer case.
[0041] Yet another aspect of the present disclosure provides a
vacuum insulating material, including: a core material; a first
envelope disposed at an outer side of the core material; a second
envelope having a thermal conductivity different from that of the
first envelope, and coupling to the first envelope to form an
accommodating space in which the core material is accommodated; and
an extension portion provided to be extended in an outer side
direction of the accommodating space, wherein the first envelope
and the second envelope are bonded to each other by welding or
adhesion on the whole of the extension portion.
[0042] Here, the extension portion may connect a first point formed
in an outermost position in which the first envelope and the second
envelope are bonded to each other in an outer side direction of the
accommodating space and a second point in which the extension
portion and the core material are bonded to each other.
[0043] Also, the first envelope may have a lower thermal
conductivity than that of the second envelope.
[0044] Also, the first envelope may include an aluminum deposition
envelope, and the second envelope includes an aluminum foil
envelope.
[0045] Also, the first envelope and the second envelope each may
include a coupling layer facing the accommodating space in an inner
side direction of the core material, and the coupling layers of the
first envelope and the second envelope are bonded to each other by
welding or adhesion.
[0046] Also, the coupling layer may include at least one of LLDPE
(Linear Low-Density Polyethylene) and LDPE (Low Density
Polyethylene).
[0047] Also, the vacuum insulating material may further include: a
blocking layer disposed between the core material and at least one
of the first envelope and the second envelope.
[0048] Also, the blocking layer may be bonded to at least one of
the first envelope and the second envelope to form an integral unit
with at least one of the first envelope and the second
envelope.
[0049] Also, the blocking layer may have a width equal to or
smaller than the core material.
[0050] Also, the blocking layer may have a width larger than the
core material.
[0051] Also, the extension portion may connect a first point formed
in an outermost position in which the first envelope and the second
envelope are bonded to each other in an outer side direction of the
accommodating space and a second point in which the extension
portion and the core material are bonded to each other, and at
least one end of the blocking layer extended toward an outer side
direction of the accommodating space may be positioned between the
first point and the second point.
[0052] Also, the vacuum heating insulating material may further
include: a blocking layer disposed between the core material and
any one of the first envelope and the second envelope having a
lower thermal conductivity.
Advantageous Effects
[0053] According to the present disclosure, by bonding a first
envelope and a second envelope to each other by welding or
adhesion, durability of a vacuum insulating material can be
improved.
[0054] By using a hybrid envelope including a first envelope and a
second envelope having different thermal conductivities bonded to
each other, Heat Bridge can be effectively prevented.
[0055] By disposing a blocking layer between a core material and a
first envelope, bonded to the first envelope, the penetration of
gas and moisture can be decreased.
[0056] By using a vacuum insulating material provided with thin
thickness and superior heat insulating performance between an outer
case and an inner case of a refrigerator, a slim design of the
refrigerator can be implemented and at the same time the storage
capacity of the refrigerator can be increased.
DESCRIPTION OF DRAWINGS
[0057] FIG. 1 is a perspective view illustrating an exterior
appearance of a refrigerator in accordance with one embodiment of
the present disclosure.
[0058] FIG. 2 is a cross-sectional view illustrating the
refrigerator in accordance with one embodiment of the present
disclosure.
[0059] FIG. 3 is an enlarged cross-sectional view illustrating one
portion of FIG. 2.
[0060] FIG. 4 is a perspective view illustrating a vacuum
insulating material in accordance with one embodiment of the
present disclosure.
[0061] FIG. 5 is a cross-sectional view illustrating a state prior
to a first envelope and a second envelope of the vacuum insulating
material in accordance with one embodiment of the present
disclosure being coupled.
[0062] FIG. 6 is a cross-sectional view illustrating a state prior
to an extension portion of the vacuum insulating material in
accordance with one embodiment of the present disclosure being
bent.
[0063] FIG. 7 is an enlarged cross-sectional view illustrating the
first envelope of the vacuum insulating material in accordance with
one embodiment of the present disclosure.
[0064] FIG. 8 is an enlarged cross-sectional view illustrating a
portion `Q` of the vacuum insulating material of FIG. 6.
[0065] FIG. 9 is an enlarged cross-sectional view illustrating a
first envelope of a vacuum insulating material in accordance with
another embodiment of the present disclosure.
[0066] FIG. 10 is an enlarged cross-sectional view illustrating a
second envelope of the vacuum insulating material in accordance
with one embodiment of the present disclosure.
[0067] FIG. 11 is an enlarged cross-sectional view illustrating an
extension portion of the vacuum insulating material in accordance
with one embodiment of the present disclosure.
[0068] FIG. 12 is a cross-sectional view illustrating a state of
the bent extension portion in accordance with one embodiment of the
present disclosure.
[0069] FIG. 13 is a cross-sectional view illustrating a state prior
to bending of the extension portion of the vacuum insulating
material in accordance with another embodiment of the present
disclosure.
[0070] FIG. 14 is a cross-sectional view illustrating a state of
the bent extension portion in accordance with another embodiment of
the present disclosure.
[0071] FIG. 15 is a cross-sectional view illustrating a state prior
to bending of the extension portion of the vacuum insulating
material in accordance with still another embodiment of the present
disclosure.
MODES OF THE INVENTION
[0072] Hereinafter, preferred embodiments of the present disclosure
will be described in detail with reference to the accompanying
drawings. Meanwhile, terms used in the following description such
as "front end", "rear end", "upper portion, "lower portion", "top",
"bottom", etc., are defined based on the drawings, and the shape
and position of each component are not limited by these terms.
[0073] FIG. 1 is a perspective view illustrating an exterior
appearance of a refrigerator in accordance with one embodiment of
the present disclosure, FIG. 2 is a cross-sectional view
illustrating the refrigerator in accordance with one embodiment of
the present disclosure, FIG. 3 is an enlarged cross-sectional view
illustrating one portion of FIG. 2, and FIG. 4 is a perspective
view illustrating a vacuum insulating material in accordance with
one embodiment of the present disclosure.
[0074] Referring to FIG. 1 to FIG. 4, a refrigerator 1 includes a
body 10 forming an exterior appearance of the refrigerator 1 and a
storage compartment 20 provided at an inside the body 10 such that
a front surface of the storage compartment 20 is open.
[0075] The body 10 may include an inner case 11 forming the storage
compartment 20, and an outer case 13 forming the exterior
appearance, and may include a cool air supplying apparatus
configured to supply cool air to the storage compartment 20.
[0076] The cool air supplying apparatus includes a compressor C, a
condenser (not shown), an expansion valve (not shown), an
evaporator 26, and a blower fan 27, and a foam insulating member 15
may be formed between the inner case 11 and the outer case 13 of
the body 10 as to prevent a leakage of cool air of the storage
compartment 20.
[0077] A machine room 23 may be provided at a lower side of a rear
of the body 10, in which the compressor C configured to compress a
refrigerant and the condenser configured to condense the compressed
refrigerant are installed.
[0078] The storage compartment 20 is divided into left and right
sides by a dividing wall 17, while a refrigerating compartment 21
is provided at the right side of the body 10 and a freezing
compartment 22 is provided at the left side of the body 10.
[0079] The refrigerator 1 may further include a door 30 to
open/close the storage compartment 20.
[0080] The refrigerating compartment 21 and the freezing
compartment 22 each is open/closed by a refrigerating compartment
door 31 and a freezing compartment door 33 each rotatably coupled
to the body 10, and a plurality of door guards 35 may be provided
at rear surfaces of the refrigerating compartment door 31 and the
freezing compartment door 33 as to store food.
[0081] A plurality of shelves 24 is provided at the storage
compartment 20 to divide the storage compartment 20 into a
plurality of units, and material such as food is stacked at an
upper portion of the shelves 24.
[0082] In addition, a plurality of storage boxes 25 may be provided
at the storage compartment 20 in a way to be deposited and
withdrawn in a sliding method.
[0083] The refrigerator 1 may further include a hinge module 40
having an upper hinge 41 and a lower hinge 43 such that the door 30
is rotatably coupled into the body 10.
[0084] A foaming space `S` is provided between the inner case 11
forming the storage compartment 20 and the outer case 13 coupled to
an outer side of the inner case 11 to form an exterior appearance,
and the foam insulating member 15 is filled in the foaming space
`S`.
[0085] A Vacuum Insulation Panel (VIP) 100 may be filled together
with the foam insulating member 15 as to reinforce heat insulating
performance of the foam insulating member 15.
[0086] The Vacuum Insulation Panel 100 includes a core material 110
and envelopes 130 and 140, and the envelopes 130 and 140 are
referred to as key elements configured to maintain lifespan of the
Vacuum Insulation Panel 100 by blocking microscopic gas and
moisture from penetrating to an inside that is in a vacuum
state.
[0087] The envelopes 130 and 140 of the Vacuum Insulation Panel 100
may include a first envelope 130 and a second envelope 140.
[0088] The first envelop 130 may be disposed at an outer side of
the core material 110. The second envelope 140 may be coupled to
the first envelope 130 to form an accommodating space 160 in which
the core material 110 is accommodated.
[0089] The first envelop 130 and the second envelope 140 may be
bonded to each other by welding or adhesion. When the first envelop
130 and the second envelope 140 are bonded to each other by welding
or adhesion, a gap or a passage through which at least one of gas
and moisture can be moved is closed, and therefore the penetration
of at least one of gas and moisture toward the core material 110
may become difficult. Accordingly, durability of the Vacuum
Insulation Panel 100 may be improved. In addition, by bonding the
first envelope 130 and the second envelope 140 to each other by
welding or adhesion, manufacturability of the Vacuum Insulation
Panel 100 may be improved. That is, when the envelopes 130 and 140
of the Vacuum Insulation Panel 100 are damaged, it is difficult to
maintain a vacuum state of the accommodating space 160 in which the
core material 110 is generally accommodated. However, when the
first envelope 130 and the second envelope 140 are bonded to each
other by welding or adhesion, the vacuum state of the accommodating
space 160 in which the core material 110 is accommodated may be
maintained even though the envelopes 130 and 140 are damaged in the
manufacturing process.
[0090] The first envelope 130 and the second envelope 140 may have
the same or different thermal conductivities.
[0091] When the first envelope 130 and the second envelope 140 have
different thermal conductivities, the first envelope 130 having
smaller thermal conductivity may be disposed at an outer side of
the core material 110 to face an inner surface 13a of the outer
case 13. The second envelope 140 having larger thermal conductivity
may be disposed at an outer side of the core material 110 to face
an outer surface 11a of the inner case 11 and coupled to the first
envelope 130 to form the accommodating space 160 in which the core
material 110 is accommodated.
[0092] The first envelope 130 may be bonded to the inner surface
13a of the outer case 13. As the first envelope 130 having smaller
thermal conductivity is bonded to the inner surface 13a of the
outer case 13, heat insulating performance may be improved, and
also, an introduction of outside moisture and gas into an inner
side of the Vacuum Insulation Panel 100 may be prevented. In
addition, as an outer surface of the first envelope 130 facing the
inner surface 13a of the outer case 13 is leveled, a bonding to the
inner surface 13a of the outer case 13 is convenient. An extension
portion 150 (FIGS. 6 and 12) that is formed as the first envelope
130 and the second envelope 140 are coupled to each other is bent
toward the inner case 11 such that the first envelope 130 is
positioned at an outer side of the second envelope 140, an outer
surface of the second envelope 140 may not be leveled.
[0093] However, although the first envelope 130 is bonded to the
inner surface 13a of the outer case 13, the present disclosure is
not limited thereto. For example, the second envelope 140 rather
than the first envelope 130 may be bonded to the inner surface 13a
of the outer case 13.
[0094] FIG. 5 is a cross-sectional view illustrating a state prior
to a first envelope and a second envelope of the vacuum insulating
material in accordance with one embodiment of the present
disclosure being coupled, FIG. 6 is a cross-sectional view
illustrating a state prior to an extension portion of the vacuum
insulating material in accordance with one embodiment of the
present disclosure being bent, FIG. 7 is an enlarged
cross-sectional view illustrating the first envelope of the vacuum
insulating material in accordance with one embodiment of the
present disclosure, FIG. 8 is an enlarged cross-sectional view
illustrating a portion `Q` of the vacuum insulating material of
FIG. 6, FIG. 9 is an enlarged cross-sectional view illustrating a
first envelope of a vacuum insulating material in accordance with
another embodiment of the present disclosure, FIG. 10 is an
enlarged cross-sectional view illustrating a second envelope of the
vacuum insulating material in accordance with one embodiment of the
present disclosure, FIG. 11 is an enlarged cross-sectional view
illustrating an extension portion of the vacuum insulating material
in accordance with one embodiment of the present disclosure, and
FIG. 12 is a cross-sectional view illustrating a state of the bent
extension portion in accordance with one embodiment of the present
disclosure.
[0095] Referring to FIGS. 5 to 12, a description will be made
focusing on a case in which the first envelope 130 and the second
envelope 140 have different thermal conductivities. In addition, a
case in which the first envelope 130 is an envelope to which
penetration of gas and moisture is relatively easy and the second
envelope 140 is an envelope to which penetration of gas and
moisture is relatively difficult will be described as an example.
In addition, a blocking layer 170 includes a block layer. That is,
the block layer refers to the blocking layer 170 disposed between
the core material 110 and the second envelope 140.
[0096] The first envelope 130 may include a metallic deposition
envelope, and the second envelope 140 may include an aluminum foil
envelope. Hereinafter, for the convenience of descriptions, the
first envelope 130 will be referred to as the metallic deposition
envelope, and the second envelope 140 will be referred to as the
aluminum foil envelope. The metallic deposition envelope includes
an aluminum deposit envelope. The aluminum foil envelope is
provided with lower penetration rate of moisture and gas, while the
Heat Bridge, that is, a phenomenon in which heat flows through an
edge of the vacuum insulating material, is occurred, and thus heat
insulating performance may be decreased. Meanwhile, the metallic
deposition envelope may be able to prevent the Heat Bridge as the
metallic layer is thinner when compared to the aluminum foil
envelope, while provided with higher penetration rate of moisture
and gas, and thus durability may be decreased. Hereinafter, the
Vacuum Insulation Panel 100 in accordance with the present
disclosure configured to prevent the Heat Bridge by supplementing
weaknesses of the metallic deposition envelope and the aluminum
foil envelope as the above and having an improved durability will
be described.
[0097] Hereinafter, an "upper portion" is referred to as a surface
facing an outer side of the Vacuum Insulation Panel, and a "lower
portion" is referred to as a surface facing an inner side of the
Vacuum Insulation Panel, that is, the surface facing the core
material of the Vacuum Insulation Panel. With respect to the
figures of the drawings that are not shown, FIG. 1 to FIG. 4 will
be used as references.
[0098] As illustrated in FIG. 5 to FIG. 11, the Vacuum Insulation
Panel 100 may include the core material 110, the first envelope
130, and the second envelope 140.
[0099] The core material 110 may include Glass Fiber having
superior heat insulating performance. Higher heat insulating effect
may be obtained as a panel that is woven by use of thinner Glass
Fiber is stacked on top of each other to form a structure. In
particular, as each Pore Size between the Fiber Glass is smaller,
the effect of Radiation, that is, heat insulating performance, may
be minimized, and thus higher heat insulating effect may be
expected.
[0100] The core material 110 may be formed only with Fiber
Glass.
[0101] The first envelope 130 is disposed at one surface of the
core material 110, and the second envelope 140 may be disposed at
the other surface of the core material 110 so that the first
envelope 130 is coupled to the second envelope 140 to form the
accommodating space 160 in which the core material 110 is
accommodated. In addition, the first envelope 130 and the second
envelope 140 may be formed with different material to each
other.
[0102] The types of the first envelope 130 and the second envelope
140 may be different from each other.
[0103] In addition, the first envelope 130 and the second envelope
140 may be made of different materials from each other.
[0104] In addition, the first envelope 130 and the second envelope
140 may be provided with different thickness from each other.
[0105] In addition, the first envelope 130 and the second envelope
140 may be provided with different stacking structure from each
other. In particular, the first envelope 130 and the second
envelope 140 may form different layers, respectively. Even in a
case when the layers formed by the first envelope 130 and the
second envelope 140 are identical to each other, the arrangements
of the layers may be different to each other.
[0106] In addition, the first envelope 130 and the second envelope
140 may have different numbers of stacked layers from each other.
Even in a case when the types of the first envelope 130 and the
second envelope 140 are identical to each other, the number of
layers of the first envelope 130 may be different from the number
of layers of the second envelope 140.
[0107] The first envelope 130 and the second envelope 140 are
coupled to each other to form the extension portion 150 that is
extended toward an outer side direction of the accommodating space
160. The extension portion 150 may be extendedly formed toward an
outer side direction from both side surfaces of the core material
110. The first envelope 130 and the second envelope 140 may be able
to maintain the accommodating space 160 in which the core material
110 is accommodated in a vacuum state, as the first envelope 130
and the second envelope 140 are bonded to each other at the
extension portion 150.
[0108] The first envelope 130 and the second envelope 140 may, on
at least a part of the extension portion 150, be bonded to each
other by welding or adhesion. Preferably, the first envelope 130
and the second envelope 140 may, on the whole of the extension
portion 150, be bonded to each other by welding or adhesion.
[0109] The first envelope 130 may include a first domain 131 and a
second domain 132.
[0110] The first domain 131 may be formed along an edge of the
first envelope 130. The second domain 132 may be formed at an inner
side of the first domain 131.
[0111] The second domain 132 may be provided with the shape of a
rectangle but is not limited thereto.
[0112] The second domain 132 may include a bent portion 132a that
is bent from an edge of the core material 110.
[0113] The second envelope 140 may include an edge portion 145 and
a central portion 146.
[0114] The edge portion 145 may be formed along an edge of the
second envelope 140. The central portion 146 may be formed at an
inner side of the edge portion 145.
[0115] The edge portion 145 may correspond to the first domain 131.
The central portion 146 may correspond to the second domain 132.
However, the corresponding relationship between the edge portion
145 and the central portion 146 is not limited thereto.
[0116] The central portion 146 may be provided with a shape of a
rectangle but is not limited thereto.
[0117] The central portion 146 may include a bent portion 132b that
is bent at an edge of the core material 110. The bent portion 132b
of the second envelope 140 may correspond to the bent portion 132a
of the first envelope 130 but is not limited thereto.
[0118] The second envelope 140 may be bonded to the first domain
131 as to form the accommodating space 160 sealed. In particular,
an edge portion 145 of the second envelope 140 is bonded to the
first domain 131 to form the accommodating space 160 having the
surroundings thereof sealed. The edge portion 145 of the second
envelope 140 may be bonded to the first domain 131 by welding or
adhesion.
[0119] The welding may include heat welding.
[0120] The first domain 131 of the first envelope 130 and the edge
portion 145 of the second envelope 140 are bonded to each other to
form the extension portion 150 that is extended toward an outer
side direction of the accommodating space 160.
[0121] The first domain 131 may be able to form a boundary 139 with
respect to the second domain 132 at a position inwardly spaced
apart by a distance of 1 cm or above and 2 cm or below from an
outer side boundary 138 of the first envelope 130. That is, the
extension portion 150 may have a width that is 1 cm or above and 2
cm or below provided inwardly from the accommodating space 160.
However, the width of the extension portion 150 is not limited to
the above example.
[0122] The extension portion 150 may include a section connecting a
first point `A` to a second point `B`. The first point `A` may be
formed at a position at which an edge of the first envelope 130 is
bonded to an edge of the second envelope 140 corresponding to the
edge of the first envelope 130. The second point `B` may be
positioned in an inner direction of the accommodating space 160
from the first point `A` to face the core material 110. In
particular, the first point `A` may be formed at a position at
which an outer side boundary 138 of the first domain 131 is bonded
to an outer side boundary 138a of the second envelope 140
corresponding to the outer side boundary 138 of the first domain
131. That is, the first point `A` may be formed at a position at
which an outermost end of the first envelope 130 meets an outermost
end of the second envelope 140 in an outer side direction of the
accommodating space 160.
[0123] The second point `B` may be formed at a position at which a
boundary 139 between the first domain 131 and the second domain 132
is bonded to the edge portion 145 of the second envelope 140
corresponding to the boundary 139. That is, the second point `B`
may be formed at a position at which the boundary 139 of the first
envelope 130 is bonded to the boundary 139a of the second envelope
140 corresponding to the boundary 139. The boundary 139a of the
second envelope 140 may be formed between the edge portion 145 and
the central portion 146 to divide the edge portion 145 and the
central portion 146. The second point `B` may face the core
material 110 that is accommodated in the accommodating space 160.
In other words, the first point `A` may be formed at an outermost
position at which the first envelope 130 is bonded to the second
envelope 140 in an outer side direction of the accommodating space
160, and the second point `B` may be formed at a position at which
the extension portion 150 is bonded to the core material 110. The
amount of moisture and gas penetrating into the accommodating space
160 may be decreased by having the extension portion 150, which
connects the first point `A` to the second point `B`, bonded by
welding or adhesion.
[0124] In a process of forming the extension portion 150 of the
Vacuum Insulation Panel 100, wrinkles may occur in at least one of
the first envelope 130 and the second envelope 140. Accordingly, a
bonded portion in which adjacent welding layers 133 of the first
envelope 130 are bonded to each other may be formed in the first
envelope 130. In addition, a bonded portion in which adjacent
sealing layers 141 of the second envelope 140 are bonded to each
other may be formed in the second envelope 140.
[0125] The bonded portion which may be formed in at least one of
the first envelope 130 and the second envelope 140 may decrease the
amount of moisture and gas penetrating into the accommodating space
160 in the same manner as that in the extension portion 150 which
is bonded by welding or adhesion.
[0126] The Vacuum Insulation Panel 100 may further include a
blocking layer 170.
[0127] The blocking layer 170 may be disposed between at least one
of the first envelope 130 and the second envelope 140 and the core
material 110 to prevent moisture and gas from penetrating into the
accommodating space 160.
[0128] Preferably, the blocking layer 170 may be installed on inner
surfaces of the envelopes 130 and 140 through which penetration of
gas and moisture is relatively easy. That is, the blocking layer
170 may be disposed between the core material 110 and the first
envelope 130 as to prevent moisture and gas from penetrating to an
inside the accommodating space 160 after passing through the first
envelope 130.
[0129] The blocking layer 170 is accommodated inside of the
accommodating space 160 together with the core material 110 and may
be bonded to at least one of the first envelope 130 and the second
envelope 140 and form an integral unit with at least one of the
first envelope 130 and the second envelope 140.
[0130] Preferably, the blocking layer 170 may be bonded to the
first envelope 130 and form an integral unit with the first
envelope 130.
[0131] The blocking layer 170 may be bonded to the second domain
132 of the first envelope 130.
[0132] Alternatively, the blocking layer 170 may be bonded to an
inner side of the second domain 132 of the first envelope 130. As
an example, the blocking layer 170 may be bonded to an inner side
of the bent portion 132a of the first envelope 130.
[0133] Alternatively, the blocking layer 170 may be bonded to a
part of the second domain 132 and the first domain 131. As an
example, the blocking layer 170 may be bonded over a part of the
second domain 132 and the first domain 131 to include the boundary
139.
[0134] When the types of the first envelope 130 and the second
envelope 140 are different from each other, the blocking layer 170
may have a width equal to or smaller than the core material 110. As
an example, when the first envelope 130 is composed of a metallic
deposition envelope and the second envelope 140 is composed of an
aluminum foil envelope, the blocking layer 170 may have a width
equal to or smaller than the core material 110.
[0135] The blocking layer 170 may have a width equal to the core
material 110. In particular, the core material 110 may include an
upper surface 111 facing the blocking layer 170, and the blocking
layer 170 may be provided with the same area as that of the upper
surface 111 of the core material 110.
[0136] Alternatively, the blocking layer 170 may have a smaller
width than the core material 110. In particular, the blocking layer
170 may be provided with a smaller area than the area of the upper
surface 111 of the core material 110.
[0137] The above is because, due to the characteristic of the
blocking layer 170, in a case when the blocking layer 170 is
provided with a larger cross-sectional area with respect to the
core material 110, the Heat Bridge may occur.
[0138] When the types of the first envelope 130 and the second
envelope 140 are the same, the blocking layer 170 may be omitted or
have a width larger than that of the core material 110.
[0139] When each of the first envelope 130 and the second envelope
140 is composed of an aluminum foil envelope regardless of the
number of stacking layers, the blocking layer 170 may be omitted.
In other words, when both the first envelope 130 and the second
envelope 140 are composed of an aluminum foil envelope, the
blocking layer 170 may be omitted regardless of whether the first
envelope 130 and the second envelope 140 have the same number or
different numbers of stacked layers. This is because, in the case
of the aluminum foil envelope, penetration of gas and moisture is
relatively difficult.
[0140] The blocking layer 170 may have a width larger than that of
the core material 110. In particular, when each of the first
envelope 130 and the second envelope 140 is composed of a metallic
deposition envelope regardless of whether the first envelope 130
and the second envelope 140 have the same number or different
numbers of stacked layers, the blocking layer 170 may have an area
larger than that of the upper surface 111 of the core material 110.
That is, when each of the first envelope 130 and the second
envelope 140 is composed of a metallic deposition envelope through
which penetration of gas and moisture is relatively easy but has
low thermal conductivity, the blocking layer 170 may have a width
larger than that of the core material 110. At this point, at least
one end of the blocking layer 170 toward an outer side direction of
the accommodating space 160 may be positioned in the extension
portion 150. In particular, the at least one end of the blocking
layer 170 toward the outer side direction of the accommodating
space 160 may be positioned between the first point `A` and the
second point `B`.
[0141] According to another aspect, the blocking layer 170 may have
a width wide enough to cover at least a part of a side surface of
the core material as well as the upper surface 111 of the core
material 110. As an example, when the first envelope 130 is
composed of a metallic deposition envelope and the second envelope
140 is composed of an aluminum foil envelope, the blocking layer
170 may be disposed between the first envelope 130 through which
penetration of gas and moisture is relatively easy and the core
material 110. The blocking layer 170 may be welded or adhered to
the first envelope 130. In addition, the blocking layer 170 may be
bent together with the first envelope 130 and extended to the
extension portion 150. In particular, at least a part of the
blocking layer 170 toward an outer side direction of the
accommodating space 160 may be positioned between the first point
`A` and the second point `B`. At this point, the blocking layer 170
may more effectively block penetrating gas and moisture toward a
side surface or an edge of the core material 110 as well as
penetrating gas and moisture toward the upper surface 111 of the
core material 110, and therefore the heat insulating performance of
the Vacuum Insulation Panel 100 may be improved.
[0142] The blocking layer 170 may be bonded to at least one of the
first envelope 130 and the second envelope 140 by welding or
adhesion.
[0143] Preferably, the blocking layer 170 may be bonded to the
first envelope 130 by welding or adhesion.
[0144] Welding may include heat welding configured to apply
heat.
[0145] The blocking layer 170 may be inserted into an inside the
accommodating space 160 together with the core material 110 as to
face the first envelope 130. The blocking layer 170 inserted into
an inside the accommodating space 160 may be welded or adhered to
the first envelope 130 by a heat processing that is applied from an
outside the Vacuum Insulation Panel 100.
[0146] In a case when the blocking layer 170 is bonded to an inner
surface or an outer surface of the first envelope 130 by use of a
separate adhesive, a vacuum state of the accommodating space 160
may be broken as the gas that is generated from the adhesive is
penetrated into an inside the accommodating space 160, or great
expense may be generated if manufactured.
[0147] The blocking layer 170 may include at least one of a metal
foil, an inorganic deposition film, and a polymer resin.
[0148] The blocking layer 170 may be provided with a width that is
identical or less than that of the second domain 132.
[0149] The blocking layer 170 may include a base layer, that is, a
first layer (not shown), that is bonded to the second domain 132 of
the first envelope 130. The base layer may be bonded to the second
domain 132 by welding or adhesion.
[0150] The blocking layer 170 may further include a second layer,
that is, at least one of at least one metallic layer (not shown),
and inorganic deposition layer (not shown). The inorganic
deposition layer is referred to as a layer at which an inorganic
substance is deposited.
[0151] Hereinafter, the base layer may be used under an identical
definition with respect to a first layer, and a second layer may be
used under an identical definition with respect to at least one of
at least one metallic layer and inorganic deposition layer.
[0152] The at least one of at least one metallic layer and
inorganic deposition layer may be stacked at the base layer toward
the core material 110. That is, the at least one of at least one
metallic layer and inorganic deposition layer may be disposed at a
lower portion of the base layer.
[0153] In particular, the blocking layer 170 may be provided with a
structure in which the base layer, which is bonded to the second
domain 132, and the at least one metallic layer, which is
positioned at a lower portion of the base layer toward the core
material 110, are stacked.
[0154] Alternatively, the blocking layer 170 may be provided with a
structure in which the base layer, which is bonded to the second
domain 132, and the inorganic deposition layer, which is positioned
at a lower portion of the base layer toward the core material 110,
are stacked.
[0155] Alternatively, the blocking layer 170 may be provided with a
structure in which the base layer, which is bonded to the second
domain 132, and the at least one metallic layer and the inorganic
deposition layer, which are positioned at a lower portion of the
base layer toward the core material 110, are stacked. The at least
one metallic layer and the inorganic deposition layer may be
stacked in various order.
[0156] The blocking layer 170 may include only the at least one
metallic layer. In a case when the blocking layer 170 is composed
of only the at least one metallic layer, the at least one metallic
layer faces the second domain 132 and bonded to the second domain
132.
[0157] The first envelope 130 may include the welding layer 133 and
at least one barrier layer 180.
[0158] The welding layer 133 may face the accommodating space 160
toward an inner side direction of the core material 110. The
welding layer 133 may include at least one of LLDPE (Linear
Low-Density Polyethylene), LDPE (Low Density Polyethylene), HDPE
(High Density Polyethylene), and CPP (Casting Polypropylene), each
provided with superior sealing performance. The welding layer 133
may preferably include at least one of LLDPE (Linear Low-Density
Polyethylene) or LDPE (Low Density Polyethylene), as the LLDPE
(Linear Low-Density Polyethylene) or the LDPE (Low Density
Polyethylene) may be able to easily adhered to by the heat that may
be applied during a process of bonding the blocking layer 170 to
the second domain 132. Being able to be easily adhered to is
referred to an adhering at an optimal temperature at which the
components of other envelopes are not hindered.
[0159] The welding layer 133 may be formed in the shape of
film.
[0160] The at least one barrier layer 180 may be stacked at an
upper portion of the welding layer 133, and may include a substrate
layer 134 and a deposition layer 135.
[0161] The substrate layer 134 may include at least one of PET
(Polyethylene Phthalate), VMPET (Vacuum Metalized Polyethylene
Phthalate), EVOH (Ethylene Vinyl Alcohol), and Nylon.
[0162] The deposition layer 135 may be provided at the substrate
layer 134 as to block gas and moisture being introduced toward the
core material 110.
[0163] The deposition layer 135 may be formed by physical
deposition such as Evaporating, Sputtering, and Aerosol deposition,
or by chemical deposition such as Chemical Vapor Deposition
(CVD).
[0164] The deposition layer 135 may include at least one of Al,
SiO.sub.2, and Al.sub.2O.sub.3. That is, the at least one of Al,
SiO.sub.2, and Al.sub.2O.sub.3 may be deposited at the deposition
layer 135.
[0165] The deposition layer 135 may include various types of
chemical oxides, and is not limited to Al.sub.2O.sub.3.
[0166] The at least one barrier layer 180 may include a first
barrier layer 180a, a second barrier layer 180b, and a third
barrier layer 180c. In the case as the above, the first barrier
layer 180a positioned at an upper portion of the welding layer 133
as to face the welding layer 133 may include a first substrate
layer 134a surrounding the welding layer 133 and a first deposition
layer 135a disposed at an upper portion of the first substrate
layer 134a.
[0167] The second barrier layer 180b positioned at an upper portion
of the first barrier layer 180a as to face the first barrier layer
180a may include a second substrate layer 134b positioned at an
upper side of the first deposition layer 135a and a second
deposition layer 135b positioned between the first deposition layer
135a and the second substrate layer 134b. That is, the second
barrier layer 180b may be stacked at an upper portion of the first
barrier layer 180a so that the first deposition layer 135a and the
second deposition layer 135b are faced to each other.
[0168] The third barrier layer 180c positioned at an upper portion
of the second barrier layer 180b may include a third deposition
layer 135c provided at an upper portion of the second substrate
layer 134b and a third substrate layer 134c positioned at an upper
portion of the third deposition layer 135c.
[0169] The second barrier layer 180b is stacked at an upper portion
of the first barrier layer 180a such that the first deposition
layer 135a is faced with respect to the second deposition layer
135b, as to prevent cracking from being occurred at the first
deposition layer 135a. More in detail, in a case when the first
deposition layer 135a is disposed at the welding layer 133, due to
the characteristic of the welding layer 133, a crack may be easily
occurred at the first deposition layer 135a. In a case when a crack
is occurred at the first deposition layer 135a, gas and moisture
may be introduced to an inside the Vacuum Insulation Panel 100
through the crack, and thus insulation performance of the Vacuum
Insulation Panel 100 may be decreased. Thus, the second barrier
layer 180b is preferred to be stacked at an upper portion of the
first barrier layer 180a so that the first deposition layer 135a
and the second deposition layer 135b are faced with respect to each
other.
[0170] The at least one barrier layer 180 may be provided with a
structure in which the substrate layer 134 and the deposition layer
135, which is positioned at the substrate layer 134, are positioned
while facing with respect to each other.
[0171] The at least one barrier layer 180 is not limited to the
first barrier layer 180a, the second barrier layer 180b, and the
third barrier layer 180c.
[0172] The at least one barrier layer 180 may further include a
penetration preventing layer 136.
[0173] The penetration preventing layer 136 may be provided between
the welding layer 133 and the substrate layer 134.
[0174] The penetration preventing layer 136 may further include at
least one of EVOH (Ethylene Vinyl Alcohol) and VM-EVOH (Vacuum
Metalized-Ethylene Vinyl Alcohol).
[0175] The at least one barrier layer 180 may further include a
protective layer 137.
[0176] The protective layer 137 may be disposed at an outermost
skin of the first envelope 130 toward an outer side direction of
the core material 110.
[0177] The protective layer 137 is configured to perform a role to
protect a surface or the core material 110 at an inside the Vacuum
Insulation Panel 100 from an outside impact by absorbing or
scattering the outside impact. Thus, the protective layer 137 is
preferred to be formed with material having superior impact
resistance.
[0178] The protective layer 137 may include at least one of PET
(Polyethylene Phthalate), OPP (Oriented Polypropylene), Nylon, and
Oriented Nylon.
[0179] The blocking layer 170 may be faced with the welding layer
133 of the first envelope 130, and may be bonded to the welding
layer 133. More in detail, the blocking layer 170 may be bonded to
the welding layer 133 that corresponds to the second domain 132 of
the first envelope 130.
[0180] The base layer of the blocking layer 170 may be bonded to
the welding layer 133 of the first envelope 130 by welding or
adhesion.
[0181] The second skin layer 140 may be able to surround a lower
portion of the core material 110.
[0182] The second skin layer 140 may include a sealing layer 141,
an inner layer 142, a preventive layer 143, and a cover layer
144.
[0183] The sealing layer 141 is bonded to a surface of the core
material 110 as to surround the core material 110 and the blocking
layer 170, together with the welding layer 133 of the first
envelope 130. The sealing layer 141 may include at least one of
LLDPE (Linear Low-Density Polyethylene), LDPE (Low Density
Polyethylene), HDPE (High Density Polyethylene) and CPP (Casting
Polypropylene), each provided with superior sealing
performance.
[0184] The sealing layer 141 may be formed in the shape of
film.
[0185] The inner layer 142 may be positioned at an upper side of
the sealing layer 141. The inner layer 142 may include at least one
of PET (Polyethylene Phthalate), VMPET (Vacuum Metalized
Polyethylene Phthalate), EVOH (Ethylene Vinyl Alcohol), and
Nylon.
[0186] The preventive layer 143 may be provided between the sealing
layer 141 and the inner layer 142, and may include AI.
[0187] The cover layer 144 is configured to perform a role to
protect a surface or the core material 100 at an inside the Vacuum
Insulation Panel 100 from an outside impact by absorbing or
scattering the outside impact. Thus, the cover layer 144 is
preferred to be formed with material having superior impact
resistance.
[0188] The cover layer 144 may include at least one of PET
(Polyethylene Phthalate), VMPET (Vacuum Metalized Polyethylene
Phthalate), EVOH (Ethylene Vinyl Alcohol), and Nylon.
[0189] The welding layer 133 corresponding to the first domain 131
of the first envelope 130 may be able to form the extension portion
150 by being coupled to the sealing layer 141 that corresponds to
the edge portion 145 of the second envelope 140.
TABLE-US-00001 TABLE 1 Core Thermal Conductivity (30 Extension Core
Thermal Days after in Structure of First portion Effective Thermal
Conductivity room Embodiments Envelope bonded? Conductivity
(Initial) temperature) Embodiment 1 Deposition Layer .largecircle.
3.7 2.04 2.08 (3 Layers) + Blocking Layer Embodiment 2 Deposition
Layer X 3.8 2.01 2.30 (3 Layers)
[0190] [TABLE 1] shows thermal conductivity of the Vacuum
Insulation Panel depending on whether the extension portion is
bonded and the presence of the blocking layer.
[0191] As shown on [TABLE 1], the Vacuum Insulation Panels 100 may
be provided with different thermal conductivity with respect to
each other depending on whether the blocking layer 170 is present
and whether the extension portion 150 is bonded.
[0192] The effective thermal conductivity is referred to as a value
that factors in the thermal conductivity at a central unit of the
Vacuum Insulation Panel 100 as well as the thermal conductivity at
the edge portion of the Vacuum Insulation Panel 100, and is
provided with the unit of "mW/mK." The smaller the effective
thermal conductivity is, the superior the heat insulating
performance of the Vacuum Insulation Panel is.
[0193] The core thermal conductivity is referred to as a value of
the thermal conductivity measured at the central portion of the
Vacuum Insulation Panel 100, and is provided with the unit of
"mW/mK." When the initial value of the core thermal conductivity
and the value of the core thermal conductivity after 30 days are
compared, the reliability of the Vacuum Insulation Panel 100 may be
estimated. The smaller the value difference between the initial
value of the core thermal conductivity and the value of the core
thermal conductivity after 30 days is, the superior the reliability
and the heat insulating performance of the Vacuum Insulation Panel
100 is.
[0194] The Vacuum Insulation Panel 100 of the embodiment 1 is
provided with the first envelope 130 structured in 3 layers having
AI, the deposition layer 135, and the blocking layer 170, and the
Vacuum Insulation Panel 100 of the embodiment 2 is provided with
the first envelope 130 structured in 3 layers having AI and the
deposition layer 135 while the blocking layer 170 is omitted.
[0195] The Vacuum Insulation Panel 100 of the embodiment 1 is
provided with the bonded extension portion 150, and the Vacuum
Insulation Panel 100 of the embodiment 2 is provided with the
extension portion 150 that is not bonded.
[0196] As shown on the [TABLE 1], the Vacuum Insulation Panel 100
of the embodiment 1 is provided with the smaller effective thermal
conductivity with compared to the Vacuum Insulation Panel 100 of
the embodiment 2. With respect to the difference of the core
thermal conductivity according to elapsed time, the core thermal
conductivity of the Vacuum Insulation Panel 100 of the embodiment 1
is further smaller than the core thermal conductivity of the Vacuum
Insulation Panel 100 of the embodiment 2, and thus, in a case when
the extension portion 150 is bonded and the blocking layer 170 is
included, the heat insulating performance and the reliability of
the Vacuum Insulation Panel 100 are improved.
[0197] The Vacuum Insulation Panel 100 may further include an
absorption material 120.
[0198] The absorption material 120 is provided at an inside the
core material 110, and may absorb at least one of gas or moisture
that is introduced to an inside the core material 110 as to
maintain a state of vacuum of the core material 110. The absorption
material 120 may be in the form of powers, or may be structured to
be provided with a predetermined block or a rectangular shape. In
addition, the absorption material 120 may be coated on an inner
surface of the at least one of the first envelope 130 or the second
envelope 140 or on a surface of the core material 110, or may be
inserted into an inside the core material 110.
[0199] The absorption material 120 may include Ca0, Ba0, and
Mg0.
[0200] The absorption material 120 may further include a
catalyst.
[0201] A manufacturing method of the Vacuum Insulation Panel 100
may include a forming of the shape of an envelope by coupling the
first envelope 130 and the second envelope 140 into each other such
that one side of the accommodating space 160 is open, an inserting
of the core material 110 into an inside the accommodating space
160, and a forming of the sealed accommodating space 160 by
coupling one sides of the first envelope 130 and the second
envelope 140. More in detail, the manufacturing method of the
Vacuum Insulation Panel 100 may include a coupling of an outermost
end of the edge portion 145 of the first domain 131 of the first
envelope 130 with respect to an outermost end of the edge portion
245 of the second envelope 140 such that one side of the
accommodating space 160 is open, an inserting of the core material
100 into an inside the accommodating space 160, and forming of the
sealed accommodating space 160, that is, being in a vacuum state by
coupling the open one side of the first domain 131 of the first
envelope 130 with respect to the open one side of the edge portion
145 of the second envelope 140. The blocking layer 170 may be
inserted into the accommodating space 160 to face at least one of
the first envelope 130 and the second envelope 140 in a process of
inserting the core material 110 into the accommodating space 160.
As the edge portions 145 of the first domain 131 of the first
envelope 130 and of the second envelope 140 are coupled with
respect to each other, the extension portion 150 facing an outer
side of the accommodating space 160 may be formed.
[0202] The manufacturing method of the Vacuum Insulation Panel 100
may further include an applying of heat from an outside the Vacuum
Insulation Panel 100. The blocking layer 170 is provided to be
welded or adhered to the welding layer 133 of the first envelope
130 by applying heat at the Vacuum Insulation Panel 100, and an
introduction of moisture and gas into an inside the accommodating
space 160 through the first envelope 130 may further be effectively
prevented by having the welding layer 133 of the first envelope 130
and the sealing layer 141 of the second envelope 140, both of which
are configured to form the extension portion 150, welded or
adhered.
[0203] Pressurization other than applying heat at the Vacuum
Insulation Panel 100 may be proceeded. As an example, the Vacuum
Insulation Panel 100 may be pressurized under atmospheric
pressure.
[0204] FIG. 12 is a cross-sectional view illustrating a state of
the extension portion in accordance with one embodiment of the
present disclosure being bent. FIG. 1 to FIG. 11 will be referred
with respect to the figures of the drawing that are not shown.
[0205] As illustrated on FIG. 12, the extension portion 150 of the
Vacuum Insulation Panel 100 may be bent.
[0206] The extension portion 150 may be bent such that the second
envelope 140 is positioned between the core material 110 and the
first envelope 130. That is, the extension portion 150 may be bent
such that the first envelope 130 having smaller thermal
conductivity may be positioned at an outer side of the second
envelope 140 having greater thermal conductivity. As described
earlier, the Vacuum Insulation Panel 100 may be disposed between
the inner case 11 and the outer case 13 such that the first
envelope 130 is bonded to an inner surface of the outer case 13,
and the heal insulating performance of the Vacuum Insulation Panel
100 may be improved by bending the extension portion 150 such that
the second envelope 140 having greater thermal conductivity may be
farther from the outer case 13.
[0207] FIG. 13 is a cross-sectional view illustrating a state prior
to bending of the extension portion of the vacuum insulating
material in accordance with another embodiment of the present
disclosure, and FIG. 14 is a cross-sectional view illustrating a
state of the bent extension portion in accordance with another
embodiment of the present disclosure. Hereinafter, reference
numerals which are not shown refer to FIGS. 1 to 12. In addition,
repeated descriptions with respect to FIGS. 1 to 12 will be
omitted. In FIGS. 13 to 15, description will be made focusing on a
case in which the first envelope 130 and the second envelope 140
have the same thermal conductivity.
[0208] The Vacuum Insulation Panel 100 may include the core
material 110 having an upper surface 111a that faces the first
envelope 130.
[0209] The Vacuum Insulation Panel 100 may further include the
first envelope 130 and the second envelope 140 which surround the
core material 110.
[0210] The first envelope 130 may include at least one of a
metallic deposition envelope and an aluminum foil envelope.
[0211] The second envelope 140 may include at least one of a
metallic deposition envelope and an aluminum foil envelope.
[0212] The first envelope 130 and the second envelope 140 may be
coupled to each other to form the extension portion 150 that is
extended toward an outer side direction of the accommodating space
160. The extension portion 150 may be formed to extend in the outer
side direction of the accommodating space 160 from both side
surfaces of the core material 110. The first envelope 130 and the
second envelope 140 may be bonded to each other at the extension
portion 150 to maintain the accommodating space 160 in which the
core material 110 is accommodated in a vacuum state.
[0213] The first envelope 130 and the second envelope 140 may be
bonded to each other by welding or adhesion on at least a part of
the extension portion 150. Preferably, the first envelope 130 and
the second envelope 140 may, on the entire extension portion 150,
be bonded to each other by welding or adhesion.
[0214] The extension portion 150 may include a section connecting a
first point `A` to a second point `B`. The first point `A` may be
formed at a position at which an edge of the first envelope 130 is
bonded to an edge of the second envelope 140 corresponding to the
edge of the first envelope 130. The second point `B` may be
positioned toward an inner direction of the accommodating space 160
from the first point `A` to face the core material 110. In other
words, the first point `A` may be formed at an outermost position
at which the first envelope 130 is bonded to the second envelope
140 in an outer side direction of the accommodating space 160, and
the second point `B` may be formed at a position at which the
extension portion 150 is bonded to the core material 110. The
amount of moisture and gas penetrating into the accommodating space
160 may be decreased by having the extension portion 150, which
connects the first point `A` to the second point 13', bonded by
welding or adhesion.
[0215] Each of the first envelope 130 and the second envelope 140
may have a coupling layer that faces the accommodating space 160,
in an inner side direction of the core material 110. The coupling
layer may be used as meaning including at least one of a welding
layer 133 and a sealing layer 141. The coupling layers of the first
envelope 130 and the second envelope 140 may be bonded to each
other by welding or adhesion.
[0216] The coupling layer may include at least one of LLDPE (Linear
Low-Density Polyethylene), LDPE (Low Density Polyethylene), HDPE
(High Density Polyethylene), and CPP (Casting Polypropylene), each
provided with superior sealing performance. Preferably, the
coupling layer may include at least one of LLDPE (Linear
Low-Density Polyethylene) and LDPE (Low Density Polyethylene)
[0217] The coupling layer of the first envelope 130 and the
coupling layer of the second envelope 140 may be bonded to each
other under at least one condition of heating and pressurization.
The heating and pressurization conditions may vary according to the
physical properties and chemical properties of the bonding layer.
As an example, the coupling layer of the first envelope 130 and the
coupling layer of the second envelope 140 may be bonded to each
other by welding or adhesion under the atmospheric pressure
condition.
[0218] Any one of the first envelope 130 and the second envelope
140 may be bonded along an edge of the other one of the first
envelope 130 and the second envelope 140 by welding or
adhesion.
[0219] When both the first envelope 130 and the second envelope 140
are metallic deposition envelopes, the degree of penetration of gas
and moisture can be decreased by having the first envelope 130 and
the second envelope 140 be bonded to each other by welding or
adhesion. The reason for the decrease in penetration of moisture or
gas is the same as a case in which both the first envelope 130 and
the second envelope 140 are aluminum foil envelopes.
[0220] However, when both the first envelope 130 and the second
envelope 140 are metallic deposition envelopes, the degree of
penetration of gas and moisture can be further decreased by
disposing a blocking layer 170. The disposition of the block layer
170 will be described later.
[0221] As illustrated in FIG. 14, the extension portion 150 of the
Vacuum Insulation Panel 100 may be bent.
[0222] In a process of bending the extension portion 150 of the
Vacuum Insulation Panel 100, cracks may occur in at least one of
the first envelope 130 and the second envelope 140. Gas or moisture
may be introduced inside the Vacuum Insulation Panel 100 through
the cracks, and this can have a significant effect on the decrease
in insulation performance and durability of the Vacuum Insulation
Panel 100. The decrease in insulation performance and durability of
the Vacuum Insulation Panel 100 due to the occurrence of the cracks
may be prevented by bonding, preferably, welding the first envelope
130 and the second envelope 140 to each other. That is, the gas or
moisture introduced through the cracks should pass through a
portion at which the first envelope 130 and the second envelope 140
are bonded or welded to each other, and thus it is difficult for
the gas or moisture to reach the core material 110.
[0223] In a process of forming the extension portion 150 of the
Vacuum Insulation Panel 100 or bending the extension portion 150 of
the Vacuum Insulation Panel 100, wrinkles may occur in at least one
of the first envelope 130 and the second envelope 140. Accordingly,
a bonded portion (welding portion) in which adjacent welding layers
133 of the first envelope 130 are bonded to each other, preferably,
welded to each other, may be formed in the first envelope 130. In
addition, a bonded portion (welding portion) in which adjacent
sealing layers 141 of the second envelope 140 are bonded to each
other, preferably, welded to each other, may be formed in the
second envelope 140. The bonded portion (welding portion) in which
the welding layers 133 of the first envelope 130 are bonded to each
other, preferably, welded to each other, and the bonded portion
(welding portion) in which the sealing layers 141 of the second
envelope 140 are bonded to each other, preferably, welded to each
other, may prevent a decrease in insulation performance and
durability of the Vacuum Insulation Panel 100 due to the occurrence
of the cracks.
[0224] FIG. 15 is a cross-sectional view illustrating a state prior
to bending of the extension portion of the vacuum insulating
material in accordance with still another embodiment of the present
disclosure. Hereinafter, reference numerals which are not shown
refer to FIGS. 1 to 14. In addition, repeated descriptions with
respect to FIGS. 1 to 14 will be omitted.
[0225] As illustrated in FIG. 15, the Vacuum Insulation Panel 100
may further include the blocking layer 170, which is disposed
between the core material 110 and at least one of the first
envelope 130 and the second envelope 140, to prevent moisture and
gas from passing through at least one of the first envelope 130 and
the second envelope 140 and penetrating into the accommodating
space 160.
[0226] The blocking layer 170 may be selectively disposed.
[0227] When both the first envelope 130 and the second envelope 140
are metallic deposition envelopes, the blocking layer 170 may be
disposed between the core material 110 and at least one of the
first envelope 130 and the second envelope 140.
[0228] When both the first envelope 130 and the second envelope 140
are aluminum foil envelopes, the blocking layer 170 may be
omitted.
[0229] The blocking layer 170 may be bonded to at least one of the
first envelope 130 and the second envelope 140 by welding or
adhesion to be integrally formed with at least one of the first
envelope 130 and the second envelope 140.
[0230] The blocking layer 170 may have a width smaller than that of
at least one of the first envelope 130 and the second envelope
140.
[0231] When the first envelope 130 and the second envelope 140 have
the same thermal conductivity, preferably, when both the first
envelope 130 and the second envelope 140 are metallic deposition
envelopes, the blocking layer 170 may have a width larger than the
core material 110. In particular, the core material 110 may include
an upper surface 111b that faces the blocking layer 170, and the
blocking layer 170 may have an area larger than that of the upper
surface 111b of the core material 110.
[0232] The extension portion 150 may include the blocking layer
170. At least one end 170a of the blocking layer 170 that is
extended in an outer side direction of the accommodating space 160
may be positioned between the first point `A` and the second point
`B` of the extension portion 150.
[0233] The extension portion 150 may include an inner side portion
150a in which the blocking layer 170 is disposed and an outer side
portion 150b that is positioned in an outer side of the inner side
portion 150a in an outer side direction of the accommodating space
160.
[0234] The blocking layer 170 may be disposed between the first
envelope 130 and the second envelope 140 in the inner side portion
150a. In particular, the blocking layer 170 may be disposed between
the welding layer 133 of the first envelope 130 and the sealing
layer 141 of the second envelope 140 in the inner side portion
150a.
[0235] The blocking layer 170 may be bonded to at least one of the
first envelope 130 and the second envelope 140 by welding or
adhesion in the inner side portion 150a. In particular, the
blocking layer 170 may be bonded to at least one of the welding
layer 133 of the first envelope 130 and the sealing layer 141 of
the second envelope 140 by welding or adhesion in the inner side
portion 150a.
[0236] The first envelope 130 and the second envelope 140 may be
bonded to each other by welding or adhesion in the outer side
portion 150b. In particular, the welding layer 133 of the first
envelope 130 and the sealing layer 141 of the second envelope 140
may be bonded to each other by welding or adhesion in the outer
side portion 150b.
[0237] The blocking layer 170 may be bent together with at least
one of the first envelope 130 and the second envelope 140.
[0238] The Vacuum Insulation Panel 100 may be used in various
products, in addition to refrigerators, that are needed to be
provided with heat insulation.
[0239] Although a few embodiments of the present disclosure have
been shown and described, it would be appreciated by those skilled
in the art that changes may be made in these embodiments without
departing from the principles and spirit of the disclosure, the
scope of which is defined in the claims and their equivalents.
TABLE-US-00002 [EXPLANATION OF REFERENCE CHARACTERS] 1:
refrigerator 10: body 11: inner case 11a: outer surface of inner
case 13a: inner surface of outer case 13: outer case 15: insulating
member 17: dividing wall 20: storage compartment 21: refrigerating
compartment 22: freezing compartment 23: machine room 24: shelves
25: storage box 26: evaporator 27: blower fan 30: door 31:
refrigerating compartment door 33: freezing compartment door 35:
door guard 40: hinge module 41: upper hinge 43: lower hinge 100:
Vacuum Insulation Panel (VIP) 110: core material 111, 111a, 111b:
upper surfaces 120: absorption material 130: first envelope 131:
first domain 132: second domain 133: welding layer 180: barrier
layer 180a: first barrier layer 180b: second barrier layer 180c:
third barrier layer 134: substrate layer 134a: first substrate
layer 134b: second substrate layer 134c: third substrate layer 135:
deposition layer 135a: first deposition layer 135b: second
deposition layer 135c: third deposition layer 136: penetration
preventing layer 137: protective layer 138: outer side boundary
(first envelope) 139: boundary 140: second envelope 141: sealing
layer 142: inner layer 143: preventive layer 144: cover layer 145:
edge portion 150: extension portion 160: accommodating space 170:
blocking layer 132a, 132b: bent portions 170a: one end 150a: inner
side portion 150b: outer side portion 146: central portion 138a:
outer side boundary (second envelope) 139a: boundary (second
envelope)
* * * * *